Liǎng gè bùmén yíxiàng jǐngshuǐ bú fàn héshuǐ, zhè cì què wèile yùsuàn chǎo le qǐlai.
The two departments had always kept out of each other's way, but this time they got into a fight over the budget.
Tips
usage
Used to draw a line between two parties, as a truce or as a warning: each stays in its own place, like the water of a well and the water of a river. It already appears in 《红楼梦》.
